I used to have a 65mph Puch Maxi. It's true. However...
It was not puch powered. It had a Minarelli clone Jog 90 long case motor with a 104cc stroker big bore kit installed, and race gears. It did wheelies if you gave full throttle from a stop I had a monster tire on the back, 150/90r13 that was only slightly smaller in overall diameter than the front tire (16" wheel) but it was really beefy. Too bad that bike was taken from me though. Damn thieves.